Höwenegg Quarry (Hewenegg Quarry), Immendingen, Hegau, Baden-Württemberg, Germany

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Steinbruch Höwenegg (Steinbruch Hewenegg), Immendingen, Hegau, Baden-Württemberg, Deutschland

A quarry in a Lower Tertiary nepheline-basalt, which was abandoned in 1979 and forms part of a protected area since 1983. Höwenegg mountain, where the quarry is situated, is also a very important locality for Tertiary fossil mammals. Collecting here is strictly prohibited.
Located about 3 km south of Immendingen.

This quarry is the type locality of Amicite, which was discovered by Otto Krumm in thin veins of the Melilite-Nephelinite-rock and provided for resarch. The first description was made by Alberti, Hentschel & Vezzalini in 1979 (see reference). Amicite is associated with Merlinoite, Calcite and Aragonite.

Mineral List

Amicite (TL) Analcime 'Apophyllite' Aragonite Augite 'Biotite' Calcite Celadonite 'Chabazite'

Chalcopyrite Epidote Garronite Gypsum Harmotome 'Hornblende' 'Limonite' Magnesite Makatite

'Melilite' Merlinoite Mesolite Montmorillonite Mountainite Natrolite Nepheline Offretite 'Olivine'

'Paulingite' 'Phillipsite' Phlogopite Scolecite Spinel 'Stilbite' Thomsonite-Ca Tobermorite Tridymite

36 entries listed. 26 valid minerals. 1 type locality (valid mineral).

References